package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 商品详情页面 数据汇总
 */

@RestController
@RequestMapping("/api/item")
public class ItemApiController {
    @Autowired
    private ProductFeignClient productFeignClient;
    //Spring容器
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;
    @Autowired
    private ListFeignClient listFeignClient;

    //获取商品详情页面 所有数据
    @GetMapping("/getItem/{skuId}")
    public Map getItem(@PathVariable Long skuId){
        Map result = new HashMap();

        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            //1.skuInfo
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);

        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            //2.三级分类
            BaseCategoryView baseCategoryView = productFeignClient.
                    getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);

        CompletableFuture<Void> priceCompletableFuture = CompletableFuture.runAsync(() -> {
            //3.价格
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price",price);
        },threadPoolExecutor);

        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            //4.销售属性及属性值
            List<SpuSaleAttr> spuSaleAttrAndChecked = productFeignClient.
                    getSpuSaleAttrAndChecked(skuInfo.getSpuId(),skuInfo.getId());
            result.put("spuSaleAttrList",spuSaleAttrAndChecked);
        }, threadPoolExecutor);

        CompletableFuture<Void> valuesSkuJsonCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            //5.组合对应skuId   json串
            Map saleAttrValuesBySpu = productFeignClient.getSaleAttrValuesBySpu(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(saleAttrValuesBySpu));
        }, threadPoolExecutor);

            //6.远程调用ES 更新热度
        CompletableFuture.runAsync(()->{
            listFeignClient.hotScore(skuId);
        },threadPoolExecutor);

        //等待所有线程执行完成
        CompletableFuture.allOf(valuesSkuJsonCompletableFuture,
                spuSaleAttrListCompletableFuture,
                priceCompletableFuture,
                categoryViewCompletableFuture,
                skuInfoCompletableFuture).join();

        return result;
    }
}
